Interactive Brokers Group, Inc. (IBKR) Insider Trading

Over the last 3 months, IBKR insiders made 5 open-market buys and 1 sale, a net sale of -$2.0M (SEC Form 4). Over the last 6 months, 771 institutions increased and 681 reduced their position (13F).

Insider Activity

Sentiment
1/100
Buys (3m)
5
Sells (3m)
1
Net (3m)
-$2.0M
Insiders buying
Insider trades by month Buys Sells
Oct
Jan
Mar
Apr
May
Jun
Context3-month price +27.9%Institutions accumulating (13F)
DateInsiderTypeSharesPrice
Jun 2, 2026Conkling Lori AdirectorBuy25$86.10
May 28, 2026Frank Thomas AJofficer: Executive Vice PresidentTax31,730$84.42
May 28, 2026Mendonca Denisofficer: Chief Accounting OfficerTax11,157$84.42
May 28, 2026Nemser Earl Hdirector, officer: Vice ChairmanTax22,486$84.42
May 28, 2026Brody Paul Jonathandirector, officer: Chief Financial OfficerTax82,920$84.42
May 28, 2026Galik Milandirector, officer: Chief Executive OfficerTax255,039$84.42
May 4, 2026Conkling Lori AdirectorBuy25$79.64
Apr 29, 2026Harris Lawrence EdirectorSell26,000$76.93
Apr 2, 2026Conkling Lori AdirectorBuy25$68.38
Mar 26, 2026Conkling Lori AdirectorBuy50$73.21
Mar 26, 2026Conkling Lori AdirectorBuy25$69.21
Jan 28, 2026Nemser Earl Hdirector, officer: Vice ChairmanSell20,469$75.75
Jan 28, 2026Nemser Earl Hdirector, officer: Vice ChairmanSell39,731$75.07
Jan 28, 2026Nemser Earl Hdirector, officer: Vice ChairmanSell3,101$77.98
Jan 28, 2026Nemser Earl Hdirector, officer: Vice ChairmanSell30,817$76.72
Jan 28, 2026Nemser Earl Hdirector, officer: Vice ChairmanSell60,882$75.83
Jan 26, 2026Nemser Earl Hdirector, officer: Vice ChairmanSell84,935$77.65
Jan 26, 2026Nemser Earl Hdirector, officer: Vice ChairmanSell100,000$76.81
Jan 26, 2026Repetto Richard HdirectorGrant389$64.31
Jan 26, 2026Yuen NicoledirectorGrant389$64.31
Jan 26, 2026Bright JilldirectorGrant389$64.31
Jan 26, 2026Conkling Lori AdirectorGrant389$64.31
Jan 26, 2026Harris Lawrence EdirectorGrant389$64.31
Jan 26, 2026Galik Milandirector, officer: Chief Executive OfficerGrant389$64.31
Jan 26, 2026Brody Paul Jonathandirector, officer: Chief Financial OfficerGrant389$64.31
Jan 26, 2026Nemser Earl Hdirector, officer: Vice ChairmanGrant389$64.31
Jan 26, 2026Peterffy WilliamdirectorGrant389$64.31
Jan 26, 2026Nemser Earl Hdirector, officer: Vice ChairmanSell60,065$78.14
Jan 7, 2026Galik Milandirector, officer: Chief Executive OfficerGrant224,650—
Jan 7, 2026Galik Milandirector, officer: Chief Executive OfficerGrant389$64.31

Source: IBKR SEC Form 4 filings, latest Jun 2, 2026. For informational purposes only — not investment advice.

Institutional activity (13F)

How institutions changed their IBKR positions over the last 6 months (SEC Form 13F).

Increased
771
New positions
287
Reduced
681
Sold out
184
Largest moves
InstitutionActionSharesFiled
VANGUARD GROUP INCReduced52.3MJan 29, 2026
BLACKROCK, INC.Increased31.7MFeb 12, 2026
BLACKROCK, INC.Reduced31.4MMay 13, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position28.2MMay 15, 2026
STATE STREET CORPIncreased19.1MMay 15, 2026
STATE STREET CORPIncreased18.8MFeb 13, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position15.0MMay 8, 2026
CANTILLON CAPITAL MANAGEMENT LLCIncreased12.8MFeb 17, 2026
CANTILLON CAPITAL MANAGEMENT LLCIncreased12.8MFeb 11, 2026
CANTILLON CAPITAL MANAGEMENT LLCReduced12.7MFeb 17, 2026
FMR LLCIncreased12.5MMay 15, 2026
CANTILLON CAPITAL MANAGEMENT LLCReduced11.2MMay 7, 2026
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLCReduced11.2MFeb 13, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased10.4MMay 15, 2026
GEODE CAPITAL MANAGEMENT, LLCReduced10.2MFeb 9, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.

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